1 /* 2 * Copyright (c) 1992/3 Theo de Raadt <deraadt@fsa.ca> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote 14 * products derived from this software without specific prior written 15 * permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 18 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: src/usr.bin/ypwhich/ypwhich.c,v 1.16 2004/04/04 19:17:38 charnier Exp $ 30 */ 31 32 #include <sys/param.h> 33 #include <sys/types.h> 34 #include <sys/socket.h> 35 36 #include <rpc/rpc.h> 37 #include <rpc/xdr.h> 38 #include <rpcsvc/yp_prot.h> 39 #include <rpcsvc/ypclnt.h> 40 41 #include <netinet/in.h> 42 43 #include <arpa/inet.h> 44 45 #include <ctype.h> 46 #include <err.h> 47 #include <netdb.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <unistd.h> 52 53 #define ERR_USAGE 1 /* bad arguments - display 'usage' message */ 54 #define ERR_NOSUCHHOST 2 /* no such host */ 55 #define ERR_NOBINDING 3 /* error from ypbind -- domain not bound */ 56 #define ERR_NOYPBIND 4 /* ypbind not running */ 57 #define ERR_NOMASTER 5 /* could not find master server */ 58 59 extern bool_t xdr_domainname(); 60 61 struct ypalias { 62 char *alias, *name; 63 } ypaliases[] = { 64 { "passwd", "passwd.byname" }, 65 { "master.passwd", "master.passwd.byname" }, 66 { "group", "group.byname" }, 67 { "networks", "networks.byaddr" }, 68 { "hosts", "hosts.byaddr" }, 69 { "protocols", "protocols.bynumber" }, 70 { "services", "services.byname" }, 71 { "aliases", "mail.aliases" }, 72 { "ethers", "ethers.byname" }, 73 }; 74 75 static void 76 usage(void) 77 { 78 fprintf(stderr, "%s\n%s\n", 79 "usage: ypwhich [-d domain] [[-t] -m [mname] | host]", 80 " ypwhich -x"); 81 exit(ERR_USAGE); 82 } 83 84 85 /* 86 * Like yp_bind except can query a specific host 87 */ 88 static int 89 bind_host(char *dom, struct sockaddr_in *lsin) 90 { 91 struct hostent *hent = NULL; 92 struct ypbind_resp ypbr; 93 struct timeval tv; 94 CLIENT *client; 95 int sock, r; 96 struct in_addr ss_addr; 97 98 sock = RPC_ANYSOCK; 99 tv.tv_sec = 15; 100 tv.tv_usec = 0; 101 client = clntudp_create(lsin, YPBINDPROG, YPBINDVERS, tv, &sock); 102 if (client == NULL) { 103 warnx("can't clntudp_create: %s", yperr_string(YPERR_YPBIND)); 104 return (YPERR_YPBIND); 105 } 106 107 tv.tv_sec = 5; 108 tv.tv_usec = 0; 109 r = clnt_call(client, YPBINDPROC_DOMAIN, 110 (xdrproc_t)xdr_domainname, &dom, 111 (xdrproc_t)xdr_ypbind_resp, &ypbr, tv); 112 if (r != RPC_SUCCESS) { 113 warnx("can't clnt_call: %s", yperr_string(YPERR_YPBIND)); 114 clnt_destroy(client); 115 return (YPERR_YPBIND); 116 } else { 117 if (ypbr.ypbind_status != YPBIND_SUCC_VAL) { 118 warnx("can't yp_bind: reason: %s", 119 ypbinderr_string(ypbr.ypbind_respbody.ypbind_error)); 120 clnt_destroy(client); 121 return (r); 122 } 123 } 124 clnt_destroy(client); 125 126 ss_addr = ypbr.ypbind_respbody.ypbind_bindinfo.ypbind_binding_addr; 127 /*printf("%08x\n", ss_addr);*/ 128 hent = gethostbyaddr(&ss_addr, sizeof(ss_addr), AF_INET); 129 if (hent) 130 printf("%s\n", hent->h_name); 131 else 132 printf("%s\n", inet_ntoa(ss_addr)); 133 return (0); 134 } 135 136 int 137 main(int argc, char **argv) 138 { 139 char *domnam = NULL, *master; 140 char *map = NULL; 141 struct ypmaplist *ypml, *y; 142 struct hostent *hent; 143 struct sockaddr_in lsin; 144 int notrans, mode; 145 int c, r; 146 u_int i; 147 148 notrans = mode = 0; 149 while ((c = getopt(argc, argv, "xd:mt")) != -1) 150 switch (c) { 151 case 'x': 152 for (i = 0; i<sizeof ypaliases/sizeof ypaliases[0]; i++) 153 printf("\"%s\" is an alias for \"%s\"\n", 154 ypaliases[i].alias, 155 ypaliases[i].name); 156 exit(0); 157 case 'd': 158 domnam = optarg; 159 break; 160 case 't': 161 notrans++; 162 break; 163 case 'm': 164 mode++; 165 break; 166 default: 167 usage(); 168 } 169 170 if (!domnam) 171 yp_get_default_domain(&domnam); 172 173 if (mode == 0) { 174 switch (argc-optind) { 175 case 0: 176 bzero(&lsin, sizeof lsin); 177 lsin.sin_family = AF_INET; 178 lsin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 179 180 if (bind_host(domnam, &lsin)) 181 exit(ERR_NOBINDING); 182 break; 183 case 1: 184 bzero(&lsin, sizeof lsin); 185 lsin.sin_family = AF_INET; 186 if ((lsin.sin_addr.s_addr = inet_addr(argv[optind])) == INADDR_NONE) { 187 hent = gethostbyname(argv[optind]); 188 if (!hent) 189 errx(ERR_NOSUCHHOST, "host %s unknown", argv[optind]); 190 bcopy((char *)hent->h_addr_list[0], 191 (char *)&lsin.sin_addr, sizeof lsin.sin_addr); 192 } 193 if (bind_host(domnam, &lsin)) 194 exit(ERR_NOBINDING); 195 break; 196 default: 197 usage(); 198 } 199 exit(0); 200 } 201 202 if (argc-optind > 1) 203 usage(); 204 205 if (argv[optind]) { 206 map = argv[optind]; 207 for (i = 0; (!notrans) && i<sizeof ypaliases/sizeof ypaliases[0]; i++) 208 if (strcmp(map, ypaliases[i].alias) == 0) 209 map = ypaliases[i].name; 210 r = yp_master(domnam, map, &master); 211 switch (r) { 212 case 0: 213 printf("%s\n", master); 214 free(master); 215 break; 216 case YPERR_YPBIND: 217 errx(ERR_NOYPBIND, "not running ypbind"); 218 default: 219 errx(ERR_NOMASTER, "can't find master for map %s: reason: %s", 220 map, yperr_string(r)); 221 } 222 exit(0); 223 } 224 225 ypml = NULL; 226 r = yp_maplist(domnam, &ypml); 227 switch (r) { 228 case 0: 229 for (y = ypml; y;) { 230 ypml = y; 231 r = yp_master(domnam, ypml->ypml_name, &master); 232 switch (r) { 233 case 0: 234 printf("%s %s\n", ypml->ypml_name, master); 235 free(master); 236 break; 237 default: 238 warnx("can't find the master of %s: reason: %s", 239 ypml->ypml_name, yperr_string(r)); 240 break; 241 } 242 y = ypml->ypml_next; 243 free(ypml); 244 } 245 break; 246 case YPERR_YPBIND: 247 errx(ERR_NOYPBIND, "not running ypbind"); 248 default: 249 errx(ERR_NOMASTER, "can't get map list for domain %s: reason: %s", 250 domnam, yperr_string(r)); 251 } 252 exit(0); 253 } 254